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Windows 7: Adobe Reader XI SLOW in Windows 7 64-bit

Just installed Reader XI (11) on a perfectly fine laptop running 7 x64. Holy cow, Reader XI is WAY slow doing ANYTHING--not just opening the program or PDF's, but even clicking in its menus. I found this thread re: Reader X/10 and followed Spengler's advice--disabled "Protected Mode." That's the ticket. After making that change, Reader is behaving properly, no long lags for every action.

In Reader XI, go to Edit/Preferences/Security (Enhanced), and uncheck "Enable Protected Mode at startup." (I also unchecked "Enable Enhanced Security" but that may not be necessary.)

You are putting yourself at risk by turning that feature off within Adobe's reader.

Those who are willing to operate a computer online without any antivirus software installed generally think that they have a handle on how to be safe. Those same people can usually figure out how to make things work (since they have such a good understanding of applications). I suggest to those people that they use IE10 with 64bit tabs enabled to make better use of ASLR.

If you must stick with Adobe's PDF reader, then you will have to figure out how to get to some PDF files since Adobe only has a 32bit IE plug-in.

Edit: Adobe reader's speed is fine on my Dell - your specs are better than mine, so there might be something else going on with your computer.

I also have found Adobe XI to be slower opening than previous versions. For me the comment pane on the right side seemed to slow things down and cause things to hang a bit. I haven't found a way to toggle it off directly, but going into, then out of 'Read Mode' seems to do the trick (view/read mode, or Ctrl+H). It hides the comment pane and things are much peppier now.

I just wanted to thank the original poster about the Preferences tip. I'm not sure what happened to Adobe Reader and recent updates, but I had been having a horrible time opening any PDF in the last few days. I have Windows 8.1 and it had never been an issue previously. Each PDF I tried to open immediately said 'Not responding' and I would have to wait several minutes for it to maybe open. And as soon as I tried to do anything with the document, it would suddenly not respond again. After disabling the protected mode at startup, everything is back to normal. I understand the comment about extra security and what-not, but I already have internet, virus/malware security and the lot. Since I have that covered, I'd rather have an Adobe Reader that actually works. Thank you!

Adobe Reader XI SLOW in Windows 7 64-bit

Windows 7 Slow after installing Adobe readerHi
I have just done a fresh installation of Windows 7.
As soon as I installed Adobe Reader it has slowed my laptop down alot
Take around 15 seconds to load up a page at time and generally opening apps has slowed down
I have even uninstalled it but still Windows 7 is running slow

General Discussion

adobe reader X very slow to open some PDF under windows 7 64-bitIt takes 2 minutes to open a one-page PDF. When double clicking on the PDF, Adobe reader opens but the PDF content doesn't display. It says 'Not responding' for about 2 minutes before it can display the content of the PDF. The PDF is just a one page file. It can be opened by other versions of adobe...

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